Expression of putative trehalose synthesis genes during outgrowth of A. niger conidia. The developmental stages are given on the x- axis: 0 h are dormant conidia; 3–72 h are swollen conidia, germlings or mycelia after so many hours of incubation in liquid AMM media; and Plate is the entire sporulating culture grown on AMM plates for 5 days. Error bars show standard error of the mean based on four biological replicates each calculated as the average of three technical replicates. For all genes, the expressions are normalized against the expression of actin. *Indicates that the expression at 0 h was statistically significant to the following time-points within the same group except 3 h (one-way ANOVA, P < 0.05). **Indicates that the expressions at 0 h were statistically significant to all of the following time-points within the same group (one-way ANOVA, P < 0.05).